[PATCH 3/4] kselftest: install sanitized kernel headers before compiling

[changbin . du]

From: Changbin Du <changbin.du@xxxxxxxxx>

There are test cases that require kernel headers. Some of this
cases has put the dependency check into individual Makefiles,
but some not. Let's sync the kernel headers at top level
Makefile to avoid compiling errors like below.

make[1]: Entering directory '/home/changbin/work/linux/tools/testing/selftests/membarrier'
gcc -g -I../../../../usr/include/    membarrier_test.c  -o /home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test
membarrier_test.c: In function âtest_membarrier_global_successâ:
membarrier_test.c:64:12: error: âMEMBARRIER_CMD_GLOBALâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
            ^
membarrier_test.c:64:12: note: each undeclared identifier is reported only once for each function it appears in
membarrier_test.c: In function âtest_membarrier_private_expedited_failâ:
membarrier_test.c:80:12: error: âMEMBARRIER_CMD_PRIVATE_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_register_private_expedited_successâ:
membarrier_test.c:103:12: error: âMEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_private_expedited_successâ:
membarrier_test.c:120:12: error: âMEMBARRIER_CMD_PRIVATE_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_private_expedited_sync_core_failâ:
membarrier_test.c:137:12: error: âMEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_COREâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_register_private_expedited_sync_core_successâ:
membarrier_test.c:160:12: error: âMEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_COREâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_private_expedited_sync_core_successâ:
membarrier_test.c:177:12: error: âMEMBARRIER_CMD_PRIVATE_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_register_global_expedited_successâ:
membarrier_test.c:194:12: error: âMEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrier_global_expedited_successâ:
membarrier_test.c:211:12: error: âMEMBARRIER_CMD_GLOBAL_EXPEDITEDâ undeclared (first use in this function)
  int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
            ^
membarrier_test.c: In function âtest_membarrierâ:
membarrier_test.c:253:15: error: âMEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_COREâ undeclared (first use in this function)
  if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
               ^
membarrier_test.c: In function âtest_membarrier_queryâ:
membarrier_test.c:296:14: error: âMEMBARRIER_CMD_GLOBALâ undeclared (first use in this function)
  if (!(ret & MEMBARRIER_CMD_GLOBAL)) {
              ^
../lib.mk:109: recipe for target '/home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test' failed
make[1]: *** [/home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test] Error 1
make[1]: Leaving directory '/home/changbin/work/linux/tools/testing/selftests/membarrier'

Signed-off-by: Changbin Du <changbin.du@xxxxxxxxx>
---
 tools/testing/selftests/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 7916aa2..656b674 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -67,13 +67,16 @@ ifndef BUILD
 endif
 
 export BUILD
-all:
+all: headers_install
 	@for TARGET in $(TARGETS); do		\
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
 		mkdir $$BUILD_TARGET  -p;	\
 		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
 	done;
 
+headers_install:
+	make -C ../../../ headers_install
+
 run_tests: all
 	@for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-- 
2.7.4